Best shot is Shingrix, given twice at 2-6 month interval. If you are on medicare expect a co-pay of $75-160 per shot.
Availability is limited so best check your local pharmacy to get on the list. If they don't have a list check around til
you find one that does. We got ours through the Sam's Club which did have a list and called us when it came in.
Shot itself was piece of cake, minor dull ache at the site for 12-24 hrs then nothing.